Pith Number

pith:YFUY2J5A

pith:2008:YFUY2J5ACR3QVUUPLGPM53H666

not attested not anchored not stored refs pending

A diatribe on expanding space

J.A. Peacock

arxiv:0809.4573 v1 · 2008-09-26 · astro-ph · physics.pop-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YFUY2J5ACR3QVUUPLGPM53H666}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

Les Houches on Dark Universe 2025: Elements of cosmology beyond FLRW

Receipt and verification

First computed	2026-07-04T15:14:39.276454Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1698d27a014770ad28f599eceecfef797f8dee1f2bb19a0c8bd2dbb9748a19c

Aliases

arxiv: 0809.4573 · arxiv_version: 0809.4573v1 · doi: 10.48550/arxiv.0809.4573 · pith_short_12: YFUY2J5ACR3Q · pith_short_16: YFUY2J5ACR3QVUUP · pith_short_8: YFUY2J5A

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YFUY2J5ACR3QVUUPLGPM53H666 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c1698d27a014770ad28f599eceecfef797f8dee1f2bb19a0c8bd2dbb9748a19c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "abf1bf93e851468efeae562bd63b0735a0039d48f90872f6cca509d29d576366",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-26T09:25:45Z",
    "title_canon_sha256": "eb89a21aad8283317198e3d5d3e6767af9a12587a2f3e2e5fbc7c9549946b4d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4573",
    "kind": "arxiv",
    "version": 1
  }
}